Current unbalance reduction in three-phase systems using single phase PHEV chargers

Fernandez, Julian; Bacha, Seddik; Riu, Delphine; Türker, Harun; Paupert, Marc

doi:10.1109/icit.2013.6505975

Cited by 24 publications

(21 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, as of yet, there is no widespread agreement as to which of the proposed Standards for the Current Unbalance Factor (SCUF) should be used. To be consistent with the previous work in (Fernandez et al, 2013), in this paper it is assumed that the minimum acceptable SCUF on the grid is 10%. The SCUF is given as follows (Putrus et al,2009):…”

Section: Current Unbalance Factormentioning

confidence: 68%

See 1 more Smart Citation

Distributed Consensus Charging for Current Unbalance Reduction

Liu

McNamara

Shorten

et al. 2014

IFAC Proceedings Volumes

View full text Add to dashboard Cite

Electric Vehicle (EV) technology has developed rapidly in recent years, with the result that increasing levels of EV penetration are expected on electrical grids in the near future. The increasing electricity demand due to EVs is expected to provide many challenges for grid companies, and it is expected that it will be necessary to reinforce the current electrical grid infrastructure to cater for increasing loads at distribution level. However, by harnessing the power of Vehicle to Grid (V2G) technologies, groups of EVs could be harnessed to provide ancillary services to the grid. Current unbalance occurs at distribution level when currents are unbalanced between each of the phases. In this paper a distributed consensus algorithm is used to coordinate EV charging in order to minimise current unbalance. Simulation results demonstrate that the proposed algorithm is effective in rebalancing phase currents.

show abstract

Section: Current Unbalance Factormentioning

confidence: 68%

“…The current balance equation can be formulated in a general framework by considering the EV charging loads on each phase (Fernandez et al, 2013). The balance equations are given as follows:…”

Section: Current Balance Equationmentioning

confidence: 99%

Distributed Consensus Charging for Current Unbalance Reduction

Liu

McNamara

Shorten

et al. 2014

IFAC Proceedings Volumes

View full text Add to dashboard Cite

show abstract

“…A genetic and greedy algorithm is used to optimally swap the phases to generate a convenient solution, leading to a minimum number of swaps to minimize network unbalance. In [49], plug-in hybrid electric vehicles are used to minimize local three-phase unbalance. It does not include a grid perspective and is done only on the point of common coupling.…”

Section: Three-phase Unbalance Minimizationmentioning

confidence: 99%

Three-Phase Unbalanced Optimal Power Flow Using Holomorphic Embedding Load Flow Method

2019

View full text Add to dashboard Cite

Distribution networks are typically unbalanced due to loads being unevenly distributed over the three phases and untransposed lines. Additionally, unbalance is further increased with high penetration of single-phased distributed generators. Load and optimal power flows, when applied to distribution networks, use models developed for transmission grids with limited modification. The performance of optimal power flow depends on external factors such as ambient temperature and irradiation, since they have strong influence on loads and distributed energy resources such as photo voltaic systems. To help mitigate the issues mentioned above, the authors present a novel class of optimal power flow algorithm which is applied to low-voltage distribution networks. It involves the use of a novel three-phase unbalanced holomorphic embedding load flow method in conjunction with a non-convex optimization method to obtain the optimal set-points based on a suitable objective function. This novel three-phase load flow method is benchmarked against the well-known power factory Newton-Raphson algorithm for various test networks. Mann-Whitney U test is performed for the voltage magnitude data generated by both methods and null hypothesis is accepted. A use case involving a real network in Austria and a method to generate optimal schedules for various controllable buses is provided.

show abstract

“…Such reactive power compensation can be used for grid support and mitigating induced voltage issues, both while vehicles are charging, and discharging in Vehicle-to-Grid mode [18]. Balancing the phases by reactive power provision has been discussed in [19] where centralized control is used for scheduling the vehicles located on different phases, but this approach requires additional communication infrastructure. Decentralized approach, more precisely, autonomous reactive power control based on droop control has been investigated in [20][21][22], but only in the case of a balanced system.…”

Section: Introductionmentioning

confidence: 98%

Phase-wise enhanced voltage support from electric vehicles in a Danish low-voltage distribution grid

Knezović

Marinelli

2016

Electric Power Systems Research

View full text Add to dashboard Cite

a b s t r a c tHigh deployment of electric vehicles (EVs) imposes great challenges for the distribution grids, especially in unbalanced systems with notable voltage variations which detrimentally affect security of supply. On the other hand, with development of Vehicle-to-Grid technology, EVs may be able to provide numerous services for grid support, e.g., voltage control. Implemented electronic equipment will allow them to exchange reactive power for autonomous voltage support without communicating with the distribution system operator or influencing the available active power for primary transportation function. This paper proposes a voltage dependent EV reactive power control and quantifies its impact on a real Danish low-voltage grid. The observed network is a heavily unbalanced three-phase four-wire grid modeled in Matlab SimPowerSystems based on real hourly measurement data. Simulations are performed in order to evaluate phase-to-neutral voltage support benefits as well as to address neutral-to-ground values, active power losses and the unbalances at the same time. The analysis shows that reactive power support both raises minimum phase-to-neutral voltage magnitudes and improves voltage dispersion while the energy losses are not notably increased. Further on, since the control is voltage dependent, provided reactive power is unequal among the phases leading to greater support on heavily loaded phases and decreased unbalances caused by residential consumption. Hence, implementation of such a phase-wise enhanced voltage support could defer the need for grid reinforcement in case of large EV penetration rates, especially in highly unbalanced networks.

show abstract

Current unbalance reduction in three-phase systems using single phase PHEV chargers

Cited by 24 publications

References 11 publications

Distributed Consensus Charging for Current Unbalance Reduction

Distributed Consensus Charging for Current Unbalance Reduction

Three-Phase Unbalanced Optimal Power Flow Using Holomorphic Embedding Load Flow Method

Phase-wise enhanced voltage support from electric vehicles in a Danish low-voltage distribution grid

Contact Info

Product

Resources

About